Scaling laws in two-imensional turbulent convection
Two-dimensional homogeneous turbulent convection is studied numerically. Though Bolgiano-Obukhov scaling is approximately valid, strong differences exist in the intermittency properties of velocity and temperature increments, where the latter are similar to those of a passive scalar. The main difference of the small-scale dynamics compared to a passive scalar arises from the Kelvin-Helmholtz instability, but this process does not affect the scaling properties. A condition for a scalar field to show the ramp-and-cliff structures of a passive scalar is discussed.
Bibliographic Reference: An article published in: Physical Review E, Vol.63, 045302 (2001), pp.045302-1 to 045302-4
Record Number: 200013480 / Last updated on: 2001-06-29
Original language: en
Available languages: en